A large all-black passerine bird in the crow family, Corvus corax.
A dark-colored South Asian swallowtail butterfly, Papilio castor
The harsh call of various birds, such as the raven or corncrake, or other creatures.
The call of a frog or toad. (see also ribbit)
A faint, harsh sound made in the throat.
To kill someone or something.
To complain; especially, to grumble; to forebode evil; to utter complaints or forebodings habitually.
To die.
To utter in a low, hoarse voice.
To make a croak.
To make its sound.